How to Update Data in Mongodb using Node js

Node js update data in mongoDB database with mongose by id; Through this tutorial; i am going to show you how update data into mongodb database with mongoose module in node js express.

The MongoDB Node. js Driver allows you to easily interact with MongoDB databases from within Node. js applications. You’ll need the driver in order to connect to your database and execute the queries described in this Quick Start series.

How to Update Data in Mongodb using Node js + Express + Mongoose

  • Step 1 – Create Node Express js App
  • Step 2 – Install Node Modules
  • Step 3 – Connect App to MongoDB
  • Step 4 – Create User Model
  • Step 5 – Create List and Update Routes
  • Step 6 – Create Views
    • Create List Page
    • Create Edit Page
  • Step 7 – Import Modules in App.js
  • Step 8 – Start App Server

Step 1 – Create Node Express js App

Execute the following command on terminal to create node js app:

mkdir my-app
cd my-app
npm init -y

Step 2 – Install Node Modules

Execute the following command on the terminal to express flash ejs body-parser mysql dependencies :

npm install -g express-generator
npx express --view=ejs

npm install

npm install express-flash --save
npm install express-session --save
npm install body-parser --save
npm install mongoose
npm install express-validator cors --save

body-parser – Node.js request body parsing middleware which parses the incoming request body before your handlers, and make it available under req.body property. In other words, it simplifies the incoming request.

Express-Flash – Flash Messages for your Express Application. Flash is an extension of connect-flash with the ability to define a flash message and render it without redirecting the request.

Express-Session– Express-session – an HTTP server-side framework used to create and manage a session middleware.

Express-EJS– EJS is a simple templating language which is used to generate HTML markup with plain JavaScript. It also helps to embed JavaScript to HTML pages

Mongoose – Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Mongoose supports both promises and callbacks.

Step 3 – Connect App to MongoDB

Create database.js file into your app root directory and add the following code into it to connect your app to the mongodb database:

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/users', {useNewUrlParser: true});
var conn = mongoose.connection;
conn.on('connected', function() {
    console.log('database is connected successfully');
});
conn.on('disconnected',function(){
    console.log('database is disconnected successfully');
})
conn.on('error', console.error.bind(console, 'connection error:'));
module.exports = conn;

Step 4 – Create Model

Create Models directory and inside this directory create userModel.js file; Then add following code into it:

const mongoose = require("../database");
// create an schema
var userSchema = new mongoose.Schema({
            name: String,
            email:String
        });
var userModel=mongoose.model('users',userSchema);
module.exports = mongoose.model("Users", userModel);

Step 5 – Create List and Update Routes

Create routes; so visit routes directory and open users.js route file; Then add the following routes into it:

var express = require('express');
var router = express.Router();
var mongoose = require('mongoose');
var userModel = require('../models/userModel');
/* GET home page. */
router.get('/', function(req, res, next) {
     
    userModel.find((err, docs) => {
        if (!err) {
            res.render("users/list", {
                data: docs
            });
        } else {
            console.log('Failed to retrieve the Users List: ' + err);
        }
    });
});
// SHOW EDIT USER FORM
router.get('/edit/(:id)', function(req, res, next){
  
        userModel.findById(req.params.id, (err, doc) => {
        if (!err) {
            res.render("users/edit", {
                title: "Update User Details",
                data: doc
            });
        }else{
            req.flash('error', 'User not found with id = ' + req.params.id)
            res.redirect('/users/list')
        }
    });
 
})
// EDIT USER POST ACTION
router.post('/update/:id', function(req, res, next) {
    req.assert('name', 'Name is required').notEmpty()   //Validate nam
    req.assert('email', 'A valid email is required').isEmail()  //Validate email
 
    var errors = req.validationErrors()
    
    if( !errors ) {   
        var user = {
            name: req.sanitize('name').escape().trim(),
            email: req.sanitize('email').escape().trim()
        }
        userModel.findByIdAndUpdate(req.body.id, 
            {name:req.body.name} {email:req.body.email}, function(err, data) {
                if(err){
                        req.flash('error', 'Something Goes to Wrong!');
                        res.render('users/list');
                }
                else{
                  req.flash('success', 'User has been updated successfully!');
                  res.redirect('/users');
                }
        }); 
    }
    else {   //Display errors to user
        var error_msg = ''
        errors.forEach(function(error) {
            error_msg += error.msg + '<br>'
        })
        req.flash('error', error_msg)
        
        /**
         * Using req.body.name 
         * because req.param('name') is deprecated
         */ 
        res.render('users/edit', { 
            title: 'Edit user',            
            id: req.params.id, 
            name: req.body.name,
            email: req.body.email
        })
    }
})
module.exports = router;

Step 6 – Create Views

Create some views; so visit views directory of your app and create list.ejs and edit.js file into it.

Create List Page

Create html markup for display list from mongodb database; So visit views directory and create list.ejs file inside it. Then add the following code into it:

<!DOCTYPE html>
<html>
<head>
	<title>Fetch and display data in hmtl table in node js express - Laratutorials.com</title>
	<link rel='stylesheet' href='/stylesheets/style.css' />
	<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
	<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous"> </head>
<body>
	<div> <a href="/" class="btn btn-primary ml-3">Home</a> </div>
	<!--   <% if (messages.error) { %>
  <p style="color:red"><%- messages.error %></p>
<% } %> -->
	<% if (messages.success) { %>
		<p class="alert alert-success mt-4">
			<%- messages.success %>
		</p>
		<% } %>
			<br>
			<table class="table">
				<thead>
					<tr>
						<th scope="col">#</th>
						<th scope="col">Name</th>
						<th scope="col">Email</th>
						<th width="200px">Action</th>
					</tr>
				</thead>
				<tbody>
					<% if(data.length){
  for(var i = 0; i< data.length; i++) {%>
						<tr>
							<th scope="row">
								<%= (i+1) %>
							</th>
							<td>
								<%= data[i].name%>
							</td>
							<td>
								<%= data[i].email%>
							</td>
							<td> <a class="btn btn-success edit" href="../users/edit/<%= data[i]._id%>">Edit</a> </td>
						</tr>
						<% }
          
   }else{ %>
							<tr>
								<td colspan="3">No user</td>
							</tr>
							<% } %>
				</tbody>
			</table>
</body>
</html>

Create Edit Page

Create html form for display edit user data into mongodb database; So visit views directory and create edit.ejs file inside it. Then add the following code into it:

<!DOCTYPE html>
<html>
<head>
	<title>node js edit data mongodb database - laratutorials.com</title>
	<link rel='stylesheet' href='/stylesheets/style.css' />
	<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
	<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous"> </head>
<body>
	<form action="/users/update/<%= data._id %>" method="post" name="form1">
		<div class="form-group">
			<label for="exampleInputPassword1">Name</label>
			<input type="text" class="form-control" name="name" id="name" value="<%= data.name %>" placeholder="Name"> </div>
		<div class="form-group">
			<label for="exampleInputEmail1">Email address</label>
			<input type="email" class="form-control" name="email" id="email" aria-describedby="emailHelp" placeholder="Enter email" value="<%= data.email %>"> </div>
		<button type="submit" class="btn btn-info">Update</button>
	</form>
</body>
</html>

Step 5 – Import Modules in App.js

Import express flash session body-parser mongoose dependencies in app.js; as shown below:

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var bodyParser = require('body-parser');
var flash = require('express-flash');
var session = require('express-session');
var usersRouter = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(session({ 
    secret: '123456catr',
    resave: false,
    saveUninitialized: true,
    cookie: { maxAge: 60000 }
}))
app.use(flash());
app.use('/list', usersRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});
// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};
  // render the error page
  res.status(err.status || 500);
  res.render('error');
});
module.exports = app;

Step 7 – Start App Server

You can use the following command to start node js app server:

//run the below command

npm start

after run this command open your browser and hit 

http://127.0.0.1:3000/list

Conclusion

Node js update data into mongodb using mongoose; In this tutorial, you have learned how to how update data into mongodb database using moongose in node js express app.

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